![]() There, the Unix-like NeXTSTEP operating system was developed, before being launched in 1989. The heritage of what would become macOS had originated at NeXT, a company founded by Steve Jobs following his departure from Apple in 1985. As of 2022, the most recent release of macOS is macOS 13 Ventura. In 2020, Apple began the Apple silicon transition, using self-designed, 64-bit ARM-based Apple M series processors on the latest Macintosh computers. In 2006, Apple transitioned to the Intel architecture with a line of Macs using Intel Core processors. MacOS has supported three major processor architectures, beginning with PowerPC-based Macs in 1999. After sixteen distinct versions of macOS 10, macOS Big Sur was presented as version 11 in 2020, and every subsequent version has also incremented the major version number. Apple shortened the name to "OS X" in 2011 and then changed it to "macOS" in 2016 to align with the branding of Apple's other operating systems, iOS, watchOS, and tvOS. Apple's other operating systems ( iOS, iPadOS, watchOS, tvOS, audioOS) are derivatives of macOS.Ī prominent part of macOS's original brand identity was the use of Roman numeral X, pronounced "ten" as in Mac OS X and also the iPhone X, as well as code naming each release after species of big cats, or places within California. All releases from Mac OS X 10.5 Leopard and after are UNIX 03 certified, with an exception for Mac OS X 10.7 Lion. The first desktop version, Mac OS X 10.0, was released on March 24, 2001. During this time, Apple co-founder Steve Jobs had left Apple and started another company, NeXT, developing the NeXTSTEP platform that would later be acquired by Apple to form the basis of macOS. MacOS succeeded the classic Mac OS, a Macintosh operating system from 1984 to 2001. Within the market of desktop and laptop computers, it is the second most widely used desktop OS, after Microsoft Windows and ahead of Linux (including ChromeOS). It is the primary operating system for Apple's Mac computers. With the drive restored, you can now boot to it by either holding the C key down at start-up with the DVD in the drive, or to select a non-DVD boot drive, then start up with the Option key held down, and select the installation drive when it shows up.MacOS ( / ˌ m æ k oʊ ˈ ɛ s/ previously OS X and originally Mac OS X) is an operating system developed and marketed by Apple Inc. If you run into any errors, try formatting the drive first and then drag the formatted volume to the Destination field instead of the entire drive device. Then click the Restore button and confirm you wish to delete the drive and restore the image to it. Then ensure it is in the Source field (drag it there if it is not), and then drag your drive of choice from the Disk Utility sidebar to the Destination field. To restore to a drive, select the Disk Image and click the Restore tab. Insert a blank disc when the burn dialog displays, and then click Burn (be sure to have Disk Utility verify the burn to ensure the media works as it should). To burn the image to DVD, select it in the sidebar and click the Burn button in the Disk Utility toolbar. Screenshot by Topher Kessler/CNETĭrag the disk image to the Disk Utility sidebar Using Disk Utility you can either restore the image to a healthy disk partition (steps 1, 2, and 3), or you can burn it to DVD (step 4) to have it on an optical disc (click for larger view). To do this, ensure your medium has at least 4GB of capacity and then follow these steps: Go to the /Contents/SharedSupport/ folder and locate the InstallESD.dmg disk image.įrom here you can either burn the disk image to DVD, or restore it to a hard drive or flash drive. (Note: You will see an option in the menu to burn the item to disc, but do not use this as it will only burn the item as-is and the resulting disc will not be bootable.) ![]() Right-click the installer and choose Show Package Contents. Go to the Applications folder and locate the Install Mac OS X Lion package.Īt this point you can either create the installation disc, or you can copy the installer to a backup location so you can create the installation disc at a later point. When downloaded it will be added to your Dock and Applications folder, but do not proceed with the installation and instead quit the store and close the installer if it has automatically opened. ![]() Purchase and download Lion from the Mac App Store. After choosing Show Package Contents on the installer, navigate to this folder to locate the InstallESD.dmg image that contains the Lion installation (click for larger view). ![]()
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